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It has to do with how the different 3d formats work. The universal 3d format is anaglyph which uses those red and blue glasses. A 3d movie has two images of everything. One for the right eye and one for the left. In anaglyph all the left eye images are one color and all the right the other color which are red and blue as well. Then the red lens blends in with the red images and only the blue can get throw. Same with the blue lens, you can only see the red images. Since this 3d format uses color all color displays can use it.
Now with other 3d formats you have a problem. Polarized 3d that they use in the theater has one polarized light wave for the left eye images and a different polarized light wave for all right eye images. Then the lenses block one light wave but not the other, so each eye only gets one image. In theaters they may have just one projector but it has two lenses with one projecting the left eye and one the right eye images at the same time. Then you have to have a special screen that can reflect the light back with the same polarization. Televisions can`t do two different light waves, just not made to do it. There are televisions that can but they have to be made to do it.
The other 3d format is field sequential which uses shutter glasses that open and close. The one lens opens will the other one closes and they do this back and forth. When a lens opens the image for that eye will flash on screen. If the refresh rate of the television is under 100 hz (refreshing 100 time per second) then you will notice a flickering effect. Old plasma lcd television are 60 hz, rather slow. The flickering is bad. Now they can make them higher than that like 120 hz, even 600 hz. You just need a tv that can flash the images for each eye alternately at a fast enough rate and sync that up with the lenses.
See it is not as simple as just plopping a 3d dvd in any old dvd player on any old television and watching it.

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